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 Laboratory Studies (3227): People
Robert  Hodyss's Picture
Jet Propulsion Laboratory
M/S 183-301
4800 Oak Grove Drive
Pasadena, CA 91109
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Robert Hodyss
Group Supervisor

  • B. S. in Chemistry, University of Florida (1999)
  • Ph. D. in Physical Chemistry, California Institute of Technology (2006)

Research Interests
  • Studies of chemical and physical processes on Titan's solid surface, lakes and atmosphere, including dissolution, precipitation, and low temperature reactions
  • Investigations of the photochemistry and physics of cryogenic ices relevant to outer Solar System bodies, utilizing infrared and ultraviolet spectroscopies, temperature programmed desorption, and differential scanning calorimetry
  • Development of instrumentation for in situ chemical analysis on planetary bodies


Habitability of Hydrocarbon Worlds: Titan and Beyond Icon Habitability of Hydrocarbon Worlds: Titan and Beyond
NASA Astrobiology Institute

Professional Experience
  • Jet Propulsion Laboratory (2005-Present)
    • Supervisor, Planetary Ices group (2017)
    • Scientist, Planetary Ices Group (2008)
    • Caltech Postdoctoral Researcher, Jet Propulsion Laboratory (2005-2008)
  • California Institute of Technology (1999-2005)
    • Graduate Researcher, Department of Chemistry (1999-2005)
    • Teaching Assistant (1999-2003)

Selected Publications
  1. Maynard-Casely, H.E., M.L. Cable, M.J. Malaska, T.H. Vu, M. Choukroun, and R. Hodyss, Prospects for Mineralogy on Titan. American Mineralogist, 2018. 103: p. 343-349.
  2. Cable, M.L., T.H. Vu, H.E. Maynard-Casely, M. Choukroun, and R. Hodyss, The Acetylene-Ammonia Co-crystal on Titan. ACS Earth and Space Chemistry, 2018.
  3. Vu, T.H., R. Hodyss, P.V. Johnson, and M. Choukroun, Preferential formation of sodium salts from frozen sodium-ammonium-chloride-carbonate brines - Implications for Ceres' bright spots. Planetary and Space Science, 2017. 141: p. 73-77.
  4. Thomas, E.C., R. Hodyss, T.H. Vu, P.V. Johnson, and M. Choukroun, Composition and Evolution of Frozen Chloride Brines under the Surface Conditions of Europa. Acs Earth and Space Chemistry, 2017. 1(1): p. 14-23.
  5. Malaska, M.J., R. Hodyss, J.I. Lunine, A.G. Hayes, J.D. Hofgartner, G. Hollyday, and R.D. Lorenz, Laboratory measurements of nitrogen dissolution in Titan lake fluids. Icarus, 2017. 289: p. 94-105.
  6. Vu, T.H., R. Hodyss, M. Choukroun, and P.V. Johnson, Chemistry of Frozen Sodium-Magnesium-Sulfate-Chloride Brines: Implications for Surface Expression of Europa's Ocean Composition. Astrophysical Journal Letters, 2016. 816(2).
  7. Maynard-Casely, H.E., R. Hodyss, M.L. Cable, T.H. Vu, and M. Rahm, A co-crystal between benzene and ethane: a potential evaporite material for Saturn's moon Titan. IUCRJ, 2016. 3: p. 192-199.
  8. Noell, A.C., T. Ely, D.K. Bolser, H. Darrach, R. Hodyss, P.V. Johnson, J.D. Hein, and A. Ponce, Spectroscopy and Viability of Bacillus subtilis Spores after Ultraviolet Irradiation: Implications for the Detection of Potential Bacterial Life on Europa. Astrobiology, 2015. 15(1): p. 20-31.
  9. Vu, T.H., M.L. Cable, M. Choukroun, R. Hodyss, and P. Beauchamp, Formation of a New Benzene-Ethane Co-Crystalline Structure Under Cryogenic Conditions. Journal of Physical Chemistry A, 2014. 118(23): p. 4087-4094.
  10. Malaska, M.J. and R. Hodyss, Dissolution of benzene, naphthalene, and biphenyl in a simulated Titan lake. Icarus, 2014. 242(0): p. 74-81.
  11. Johnson, P., R. Hodyss, and J.L. Beauchamp, Ion Funnel Augmented Mars Atmospheric Pressure Photoionization Mass Spectrometry for In Situ Detection of Organic Molecules. Journal of The American Society for Mass Spectrometry, 2014. 25(11): p. 1832-1840.
  12. Cable, M.L., T.H. Vu, R. Hodyss, M. Choukroun, M.J. Malaska, and P. Beauchamp, Experimental determination of the kinetics of formation of the benzene-ethane co-crystal and implications for Titan. Geophysical Research Letters, 2014. 41(15): p. 2014GL060531.
  13. Hodyss, R., M. Choukroun, C. Sotin, and P. Beauchamp, The solubility of Ar-40 and Kr-84 in liquid hydrocarbons: Implications for Titan's geological evolution. Geophysical Research Letters, 2013. 40(12): p. 2935-2940.
  14. Johnson, P.V., R. Hodyss, V.F. Chernow, D.M. Lipscomb, and J.D. Goguen, Ultraviolet photolysis of amino acids on the surface of icy Solar System bodies. Icarus, 2012. 221(2): p. 800-805.
  15. Jaramillo-Botero, A., Q. An, M.J. Cheng, W.A. Goddard, L.W. Beegle, and R. Hodyss, Hypervelocity Impact Effect of Molecules from Enceladus' Plume and Titan's Upper Atmosphere on NASA's Cassini Spectrometer from Reactive Dynamics Simulation. Physical Review Letters, 2012. 109(21).
  16. Johnson, P.V., R. Hodyss, D.K. Bolser, R. Bhartia, A.L. Lane, and I. Kanik, Ultraviolet-Stimulated Fluorescence and Phosphorescence of Aromatic Hydrocarbons in Water Ice. Astrobiology, 2011. 11(2): p. 151-156.
  17. Hodyss, R., C.D. Parkinson, P.V. Johnson, J.V. Stern, J.D. Goguen, Y.L. Yung, and I. Kanik, Methanol on Enceladus. Geophysical Research Letters, 2009. 36.
  18. Hodyss, R., J.D. Goguen, P.V. Johnson, C. Campbell, and I. Kanik, Release of N-2, CH4, CO2, and H2O from surface ices on Enceladus. Icarus, 2008. 197(1): p. 152-156.
  19. Hodyss, R., G. McDonald, N. Sarker, M.A. Smith, P.A. Beauchamp, and J.L. Beauchamp, Fluorescence spectra of Titan tholins: in-situ detection of astrobiologically interesting areas on Titan's surface. Icarus, 2004. 171(2): p. 525-530.


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